What is the meaning of routine peribulbar block anesthesia?

Nov 07, 2022

It mainly includes nerve stem (ulnar nerve, femoral nerve, etc.), nerve plexus (brachial plexus, cervical plexus, etc.) and ganglion (stellate ganglion) block.

Common features are: injection of local anesthetics around the corresponding nerve (plexus), temporarily blocking the conduction of nerve impulses, temporary loss of sensation and/or motor function in the innervated area, analgesia and muscle relaxation for surgery, or pain treatment.

Due to the differences in anatomical location and distribution, the complications and adverse reactions caused by nerve (plexus) block in different parts are also different.

Because the location and course of nerves (plexus) are not easy to accurately locate through the body surface, puncture is mostly based on clinical experience, so the success rate of anesthesiologists with less experience is relatively low, and the incidence of complications is relatively high, especially in the case of repeated searching for different sensation and repeated puncture. It is more likely to cause damage to surrounding tissues, such as bleeding caused by damaged blood vessels, hematoma and compression of surrounding tissues and organs, or punctured pleura resulting in pneumothorax, lung damage, and local anesthetic poisoning and other serious complications.

In order to improve the success rate of nerve (plexus) block and reduce the occurrence of complications, many years of clinical exploration have been carried out, such as the selection of puncture points according to the surgical site during brachial plexus block, the high and low approach of the intermuscular sulcus, the subclavian approach, the subcoracoid process, the paracoracoid process, and the coracoid brachial space approach. Surface positioning of the first rib, multiple injection of one injection, and continuous or multiple block combination, etc. Cervical plexus block was performed by modified C4 transversal one-point method, high head puncture of intermuscular sulcus and so on. In recent years, the surface localization of nerve stem (plexus) with neurostimulator has been used in clinic and some experience has been gained. These methods are helpful to improve the success rate of puncture, but anesthesia complications still occur from time to time. The causes of complications include unskilled or wrong operation, improper choice of puncture approach and abnormal patient anatomy.

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